21490040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{17}}^2$

素因数の和:82

約数の個数: 144

約数和(自身を含む): 60675480

約数和(自身を除く): 39185440

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 17, 20, 22, 26, 34, 40, 44, 52, 55, 65, 68, 85, 88, 104, 110, 130, 136, 143, 169, 170, 187, 220, 221, 260, 286, 289, 338, 340, 374, 440, 442, 520, 572, 578, 676, 680, 715, 748, 845, 884, 935, 1105, 1144, 1156, 1352, 1430, 1445, 1496, 1690, 1768, 1859, 1870, 2210, 2312, 2431, 2860, 2873, 2890, 3179, 3380, 3718, 3740, 3757, 4420, 4862, 5720, 5746, 5780, 6358, 6760, 7436, 7480, 7514, 8840, 9295, 9724, 11492, 11560, 12155, 12716, 14365, 14872, 15028, 15895, 18590, 18785, 19448, 22984, 24310, 25432, 28730, 30056, 31603, 31790, 37180, 37570, 41327, 48620, 48841, 57460, 63206, 63580, 74360, 75140, 82654, 97240, 97682, 114920, 126412, 127160, 150280, 158015, 165308, 195364, 206635, 244205, 252824, 316030, 330616, 390728, 413270, 488410, 537251, 632060, 826540, 976820, 1074502, 1264120, 1653080, 1953640, 2149004, 2686255, 4298008, 5372510, 10745020, 21490040]

約数ペア:

[(1, 21490040), (2, 10745020), (4, 5372510), (5, 4298008), (8, 2686255), (10, 2149004), (11, 1953640), (13, 1653080), (17, 1264120), (20, 1074502), (22, 976820), (26, 826540), (34, 632060), (40, 537251), (44, 488410), (52, 413270), (55, 390728), (65, 330616), (68, 316030), (85, 252824), (88, 244205), (104, 206635), (110, 195364), (130, 165308), (136, 158015), (143, 150280), (169, 127160), (170, 126412), (187, 114920), (220, 97682), (221, 97240), (260, 82654), (286, 75140), (289, 74360), (338, 63580), (340, 63206), (374, 57460), (440, 48841), (442, 48620), (520, 41327), (572, 37570), (578, 37180), (676, 31790), (680, 31603), (715, 30056), (748, 28730), (845, 25432), (884, 24310), (935, 22984), (1105, 19448), (1144, 18785), (1156, 18590), (1352, 15895), (1430, 15028), (1445, 14872), (1496, 14365), (1690, 12716), (1768, 12155), (1859, 11560), (1870, 11492), (2210, 9724), (2312, 9295), (2431, 8840), (2860, 7514), (2873, 7480), (2890, 7436), (3179, 6760), (3380, 6358), (3718, 5780), (3740, 5746), (3757, 5720), (4420, 4862)]